The heading makes it quite clear, this is the Brighton Centre, in Brighton.

The review is fair, albeit unenthusiastic:

One song stands tall: the encore "Life is a Rollercoaster", written by Gregg Alexander of New Radicals, is a life-affirming anthem. Before that, however, Ronan goes into a weird, semi-humorous speech inviting us to meet him "on the pier for fish and chips", or "at the bus stop if I miss the bus". When he gets there, though, he'll be alone.

As Price points out on Twitter, this is taking "were they even at the same gig as me" to a new height - yes, he's reviewing a different gig to last night's one at the O2. That's why it's headed "Brighton Centre, Brighton".

What's even more interesting is that Ronan's official Twitter, thinking Price was passing off a Brighton review as a London review, doesn't take issue with Simon describing "an embarrassing singalong", the onstage camaraderie between Keating and his band as "fake", or the fanbase as "dwindling". No, it's just worried that a joke about the beach has been relocated to Greenwich.